• sit down,
• sit doun,
• aitdown,
• zitdown,
• xitdown,
• ditdown,
• eitdown,
• witdown,
• sjtdown,
• sktdown,
• s9tdown,
• s8tdown,
• sirdown,
• sifdown,
• sigdown,
• siydown,
• si6down,
• sitdwon,
• sittdown,
• sitdoun

• sidon,
• sidney,
• sit down,
• sitton,
• sit-down.

The adjective form of the word "sitdown" is "sit-down".

The plural form of "sitdown" is "sitdowns"

The singular form of the word "sitdown" is "sitdown".